| 摘要 |
A nailing portal has pillars 10, a number of nailing elements 14,15 and an upper crossbar 12. The crossbar is connected by means of knee joints 24 to an upwardly and downwardly mobile bearing yoke 13, which is connected to the driver 14 of the nailing elements for manoeuvring of the latter. The bosses 15 of the nailing elements are disposed on a separate framework 17, which is connected to press-down elements 18,19 for pressing the bosses 15 against the object in question before the nails are begun to be driven in. The framework 17 for the bosses 15 is connected to separate manoeuvring elements 19 for pressing the framework against the object. <IMAGE> |
